Nuria Llagostera Vives last played at the U.S. Open, where she and doubles partner Liezel Huber lost in the third round. (Graham Denholm/Getty Images)

Spanish doubles specialist Nuria Llagostera Vives is facing a two-year ban after testing positive for methamphetamine at the Bank of the West Classic in July, the ITF announced Monday. You can read the full decision here.

After having wrist surgery in March, Llagostera Vives was set return to the tour in Stanford, Calif. She withdrew after doubles partner Francesca Schiavone fell ill, but by then Llagostera Vives had been randomly selected to provide a urine sample for testing.

The lab test found d-methamphetamine, commonly known as crystal meth or meth. Llagostera Vives was notified on Aug. 28, two days after the U.S. Open began. After the U.S. Open, where Llagostera Vives reached the third round with Liezel Huber, she accepted a provisional ban and has not played since.

Llagostera Vives was unable to provide any explanation to the independent tribunal as to how the drug got into her system. As a result, the tribunal issued the mandatory two-year ban, which could effectively end the 33-year-old's career. Using its discretion, the tribunal chose not to disqualify her results from the five tournaments she played after Stanford, which allows her to keep more than $30,000 in prize money. She will be eligible to play again on Sept. 7, 2015.